Drug profile

The FDA adverse-event record for Apoquel

85 FDA reports name Apoquel, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#851 of 2,679
by report volume (all drugs)
85
adverse-event reports
7.1%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Apoquel ranks #851 of 2679 by total reports (85) and #695 of 1130 by death-coded share (7.1%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#851
This drug, reports of 2679
#695
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Apoquel has 85 reports now versus 83 in that prior snapshot: 2 more (2.4%).

Report change
+2
Death-coded reports
+0
Death-coded share
−0.2 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Apoquel changes

Signature read: 85 reports place Apoquel in the upper third of FDA AER volume (#851 of 2,679).

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
85
Total Reports
6
Deaths Reported
7.1%
Death-coded share of reports

Active Ingredients

Apoquel

Administration Routes

OralUnknown

Species Affected

Dog 84
Cat 1

Most Affected Breeds

Crossbred Canine/dog 16
Terrier - Yorkshire 7
Schnauzer - Miniature 6
Retriever - Labrador 6
Shih Tzu 4
Chihuahua 4
Dog (unknown) 3
Shepherd Dog - German 3
Terrier (unspecified) 2
Terrier - Scottish 2

Most Reported Reactions

Vomiting 13
Lethargy (see also Central nervous system depression in 'Neurological') 12
Emesis (multiple) 11
Diarrhoea 8
Lack of efficacy (ectoparasite) - flea 8
Decreased appetite 7
Polydipsia 5
Seizure NOS 5
Anorexia 4
Elevated serum alkaline phosphatase (SAP) 4
Polyuria 4
Panting 4

Outcome Breakdown

Ongoing
35 (41.2%)
Recovered/Normal
27 (31.8%)
Outcome Unknown
14 (16.5%)
Euthanized
3 (3.5%)
Recovered with Sequela
3 (3.5%)
Died
3 (3.5%)

Apoquel: high report volume in the FDA AER row

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Apoquel, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Apoquel (#851 of 2,679 by report volume); death-coded 7.1%. PlainBreed drug row · report volume stamp 85 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →